Frequencies for first 10,000 rows of vin_lngt variable in vehicle dataset :

 VIN length |      Freq.     Percent        Cum.
------------+-----------------------------------
         16 |          1        0.01        0.01
         17 |      9,875       98.75       98.76
          . |        124        1.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016